Réponses

  • Utilisateur Brainly
2014-05-29T14:01:11+02:00
E=(2x+3)(5x-7)-(x-4)(3x+1)+2x(x+6)

  = (10x²-14x+15x-21)-(3x²+x-12x-4)+(2x²+12x)

  = (10x²+x-21)-(3x²-11x-4)+(2x²+12x)

  = 10x²+x-21-3x²+11x+4+2x²+12x

 = 9x²+24x-17

 
  • Utilisateur Brainly
2014-05-29T14:02:07+02:00